Bloodroot is used to cause vomiting, empty the bowels, and reduce tooth pain. It is also used to treat croup, hoarseness (laryngitis), sore throat (pharyngitis), poor circulation in the surface blood vessels, nasal polyps, achy joints, and muscles (rheumatism), warts, and fever. Bloodroot (Sanguinaria canadensis) is used as a powerful guardian for the family. Blood root can ward off evil in the home and bring better luck in family matters.